Acid/alkali Flashcards
Acid in food and drink are diluted acids. They are mixed with what to make three safe?
Water
Are concentrated acids corrosive?
Yes.
and they can damage skin and clothing. They must never be tasted or left on your skin
What’s alkali?
A compound with particular chemical properties including turning litmus blue, neutralizing acids.
In PH over 7.
What’s acid
A substance with particular chemical properties including turning litmus red neutralizing alkalis and dissolving some metals.
In PH under 7.
What’s a base?
A substance that will neutralize an acid but does not dissolve in water.
In PH greater than 7.
Ph is?
PH is the measure of how acidic/base water is the range goes from 0 to 14, with 7 being neutral. pH of less than indicate acidity, whereas a PH greater than 7 indicates a base. PH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.
What’s universal indicator.
It’s a special dye used to change color depending on whenever it’s above or below a certain PH.
What’s the reaction between acids and bases called.
Neutralization.
Formula
Acid+base➡️ salt+water
Ionize meaning
To convert (an atom, molecule, or substance) into an ion, typically by removing one or more electrons.
Strong acids _______ completely in water.
Ionize (convert into ion’)
What does acid +metal =?
Acid + metal = salt + hydrogen.
Hydrochloric acid + sodium hydroxide =?
Hydrochloride + sodium hydroxide ➡️ sodium chloride + water
When acid and alkali are added the ph value of the reaction mixture becomes close to _________ .
______= 7 (neutral)
Mixing an acid with alkali cause ps a chemical change. This chemical change is called _______.
_______= chemical reaction
If you add a base to an acid, you take away the what?
Acidity
Bases neutralize acids.
True or false
True
This means they cancel each other out.
Indigestion medicine contains ________ or _________ to neutralize stomachs acids.
Alkali / bases
The color of neutral solution is ______
Green
Examples of acids
Hydrochloric acid, sulphuric acid
Examples of alkali
Sodium hydroxide, potassium hydroxide
A bee sting is ….
Acidic
A wasp sting….
Alkali
Acid+alkali=
Salt+water
